累积叠轧ZK60/Al复合板材的微观组织及性能研究

Microstructure and Properties of ZK60/Al Composite Plate by Accumulative Roll Bonding

通过累积叠轧工艺制备出Al/ZK60/Al复合板,采用SEM、TEM、万能拉伸试验机、动态热机械分析仪研究了变形道次对ZK60/Al复合板材的微观组织及性能的影响。结果表明,不同变形道次复合板界面结合良好,无明显颈缩,断裂现象。随道次增加,ZK60/Al复合板的抗拉强度呈现先上升后下降的趋势,ARB-1道次时复合板的抗拉强度为216 MPa,伸长率达到最大值为2.6%。ZK60/Al多层复合板的温度-阻尼谱存在两个明显的内耗峰,即150℃左右的P_1弛豫型阻尼峰,300℃左右的P_2再结晶阻尼峰;ZK60/Al多层复合板材的应变-阻尼谱呈现典型的位错阻尼机理,应变阻尼可以用G-L理论分析。

Al/ZK60/Al composite plates were prepared by accumulative roll bonding.The effects of deformation passes on the microstructure and properties of ZK60/Al composite sheets were investigated by SEM,TEM,universal tensile testing machine and dynamic mechanical analyzer（DMA）.The results show that the interface of the composite plates with different deformation passes is well-bonded and there is no obvious necking or fracture.The tensile strength of ZK60/Al composite plate is increased firstly and then decreased.After ARB1 pass,the tensile strength of the composite plate is 216 MPa,and the elongation reaches 2.6%.The temperature-damping spectra of ZK60/Al multilayer composite sheet has two obvious internal friction peaks,namely,P1 relaxation type damping peak at about 150 ℃ and P2 recrystallization damping peak at about 300℃.The strain-damping spectrum of ZK60/Al multilayer composite sheet presents a typical dislocation damping mechanism,and the strain damping can be analyzed by G-L theory.